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Impedance matching circuit for 30-88MHz monopole antenna with automatic matching
Putra A.P.a, Munir A.a
a Radio Telecommunication and Microwave Laboratory, School of Electrical Engineering and Informatics, ITB, Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2015 IEEE.This paper presents an impedance matching circuit for monopole antenna in the frequency range 30-88MHz which is integrated by microcontroller with tuning algorithm as an automation component. An impedance matching type L is used for the circuit, while for the realization some trimmer capacitors and SMD inductors are employed. To get an input voltage for the microcontroller, some supporting circuits are designed including VSWR meter, comparator and amplifier with 2 levels. It shows that the circuit is successfully tested by replacing values of load impedance with ZA = 75 + 14.6952j and ZB = 75 + 25.6224j, and tuning frequency values in frequency range of 41-45MHz. When impedance matching circuit is active, VSWR values for load impedance ZA = 75 + 14.6952j in the frequency 41MHz, 43MHz, and 45MHz are 1.34, 1.35 and 1.5, respectively and for load impedance ZB = 75 + 25.6224j are 1.37, 1.373 and 1.5.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Automatic matching,Automation components,Frequency ranges,Impedance matching circuits,Input voltages,Tuning algorithm,Tuning frequency,VSWR[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]impedance matching,microcontroller,VSWR[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1109/ICWT.2015.7449247[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]